And it shall come to pass, when all these things are come upon thee,.... Declared, pronounced, foretold, and prophesied of in the three preceding chapters, especially in Deu 28:1, the blessing and the curse which I have set before thee; the blessings promised to those that pay a regard to the will of God and obey his voice, and curses threatened to the see Deu 28:1, and thou shall call them to mind among all the nations whither the Lord thy God hath driven thee; recollect the promises and the threatenings, and observe the exact accomplishment of them in their captivities, and especially in this their last and present captivity.